In health care, the process of improving or recovering lost function after an injury or illness that has caused functional limitations. May also refer to a department or area of study in medicine concerned with restoring function and mobility.

Rotation of body parts is referred to as internal (towards the centre of the body) or external (away from the centre of the body). Pointing your feet to face each other is an example of internal rotation.

A group of four muscles and their tendons that make a “cuff” over the head of the large arm bone (humerus). The rotator cuff helps to lift and rotate the arm and to stabilize the ball of the shoulder within the joint.